CN102794598A - Maintenance method of valve core gap attrition quantity of hydraulic slide valve - Google Patents
Maintenance method of valve core gap attrition quantity of hydraulic slide valve Download PDFInfo
- Publication number
- CN102794598A CN102794598A CN2012102197354A CN201210219735A CN102794598A CN 102794598 A CN102794598 A CN 102794598A CN 2012102197354 A CN2012102197354 A CN 2012102197354A CN 201210219735 A CN201210219735 A CN 201210219735A CN 102794598 A CN102794598 A CN 102794598A
- Authority
- CN
- China
- Prior art keywords
- spool
- valve
- wear extent
- gap
- flange
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses a maintenance method of valve core gap attrition quantity of a hydraulic slide valve, and the maintenance method comprises a detecting method of the valve core gap attrition quantity and a successive repair method, a gap valve and a valve hole attrition value are obtained through the maximal movement range of the attrited valve core, and the valve core is repaired by making an indentation and an arched projection. According to the detecting and repair methods of the valve core gap attrition quantity of the hydraulic slide valve disclosed by the invention, the changed waste slide valve can be reused in an old recycling mode to effectively prolong the service life of the slide valve and guarantee the repaired valve core to have high attrition resistance and good sealing performance so as to avoid impact damage.
Description
Technical field
The present invention relates to hydraulic system; More particularly; The present invention relates to a kind of repair method of spool gap wear extent of hydraulic efficiency slide valve, be used for the hydraulic efficiency slide valve spool in the detection of the wear extent that is produced after the use of a period of time and the method that re-uses after the wearing and tearing reparation.
Background technology
Hydraulic efficiency slide valve is the maximum element of use in the hydraulic system, and its function is to control the flow direction of fluid to satisfy the requirement of the required power direction of executive component, makes whole hydraulic system can carry out work on request in phase.So when hydraulic efficiency slide valve breaks down, stability, precision and the reliability of hydraulic system all had great influence.The mechanicalness failure cause of hydraulic valve is a kind of state of hydraulic test, system or element.Hydraulic efficiency slide valve if lost the function of regulation, promptly is called " inefficacy " under the rated condition of use, for recoverable product, inefficacy is exactly a fault.Wearing and tearing are the common form that lost efficacy, and common mechanical property damage failure reasons has: between the kinematic pair of machine components such as hydraulic valve core (figure one), valve, constantly produce friction in use, make accessory size, shape and surface quality change and lost efficacy.Valve core of the spool valve wearing and tearing or distortion will make the inner leakage loss of valve and make decrease in efficiency, because the fit clearance of spool and valve opening is excessive; Then can produce compression shock, in the hydraulic system, owing to commutating rapidly or closing oil duct; The fluid that flows is commutated suddenly or stop to flow; And cause that pressure sharply goes up each item, and form a very big pressure peak, be liquid and impact very much.This shows that the main cause that produces hydraulic shock is starting or stoping suddenly owing to Hydraulic Elements.Suddenly speed change or switching-over causes that rapid variation takes place for the flow velocity of working media in the hydraulic system and direction, because mobile fluid and hydraulic working part exist motional inertia, thereby makes the pressure of certain regional area rise suddenly, forms " hydraulic shock ".
When the harm of hydraulic shock is to produce hydraulic shock in the hydraulic system; The pressure peak of fluid is up to 3-4 times of normal pressure; Therefore; Hydraulic Elements such as the control valve in the system, measuring instrument even pipeline person can suffer damage, and pressure switch, overcurrent relay etc. also will send improper signal, and causes system can't operate as normal.Also can cause strong vibration and impact noise during hydraulic shock, and oily temperature is risen quickly.These all can seriously influence the stability and the reliability of hydraulic work system.Producing remedial measure after the above-mentioned phenomenon of the failure and be and change guiding valve timely changing the status quo, is the basic processing of doing to scrap for the processing As-Is of changing guiding valve.Yet; Guiding valve is a kind of high accuracy, expensive control original paper, qualified effective import 3-position 4-way for example, and weight is less than two kilograms reversal valve; Its price is up to 3000-5000RMB; And it is high to make on-the-spot guiding valve turnover rate, and for this reason, a kind of alternative restorative procedure is sought in this area.
While is for the detection in valve opening aperture.Who knows in this area, and it is should remain between 0.006 0.012mm working clearance after the assembling of two parts that the relative gap of guiding valve requires, and higher requirement is, criterion of acceptability even to 0.003mm-0.005mm that is to say that its required precision is basically within 1 μ.
Fall into into to such that the formula endoporus carries out the direct detection of measurer, with present testing tool such as, use slide measure to can not get conclusion comparatively accurately.Because the full accuracy standard of slide measure is 2 μ, micrometer full accuracy standard is 1 μ.For this reason, a kind of method that can accurately detect the valve opening internal diameter is sought in this area.
Summary of the invention
For addressing the above problem; The objective of the invention is to, a kind of repair method of spool gap wear extent of hydraulic efficiency slide valve is provided, according to the repair method of the spool gap wear extent of said hydraulic efficiency slide valve; Can carry out effective wear extent to the guiding valve under changing and detect and renovation technique, reduce cost.
For achieving the above object, technical scheme of the present invention is following:
A kind of repair method of spool gap wear extent of hydraulic efficiency slide valve comprises the detection method and subsequent the method for repairing and mending of said spool gap wear extent it is characterized in that the detection method step of said spool gap wear extent is following:
Detect step 1: with spool most of extract out valve body and with spool afterbody final section flange place the valve body openings place first with valve opening in, have relative wear because of two parts this moment, axiality changes, so spool is sagging;
Detect step 2: detect the FROM of spool flange, income value is 2A'B', and B' is the central point of tested flange, and A' is a simulation points, and simulation line segment A'B' is drawn the length of A'B' perpendicular to the center line of spool by the FROM of certain flange; Detect the spool external diameter after wearing and tearing;
Detect step 3: calculate wearing and tearing back valve core and wearing and tearing back valve opening gap width AB,
Wherein, CB is the width of spool flange, and C'B' is the distance at center to the spool tail flange center of the tested flange of spool;
Detect step 4: confirm attrition value, promptly the spool wear extent be standard spool external diameter to deduct by decreasing the spool external diameter be the spool wear extent, the valve opening wear extent is decreased the spool wear extent of spool external diameter for gap width AB deducts.
Repair method according to the spool gap wear extent of a kind of hydraulic efficiency slide valve of the present invention is characterized in that the method for repairing and mending step of said spool gap wear extent is following:
Repair step 1: reduce spool hardness, the heating spool between 4000-5000 ℃, the spool contact surface bluster after the The pre-heat treatment is heated to 700-750 ℃ after cooling, hardness drops to about HRC20;
Repair step 2: the spool working surface after hardness is weakened carries out impression to be handled, and uses the impression handling implement that has two fixed wheels and a regulating wheel, and above-mentioned operation is carried out repeatedly;
Repair step 3: use the arch of lathe correct grinding spool outstanding encircle to projecting height less than AB/2, precision is 0.3 μ-0.6 μ;
Repair step 4: recover spool hardness, bluster heating spool to 800 ℃-850 ℃, oil cooling; 500 ℃-520 ℃ of tempering, water-cooled or oil cooling.Make surface hardening hardness reach HRC48-55.
Repair method according to the spool gap wear extent of a kind of hydraulic efficiency slide valve of the present invention; It is characterized in that: the impression handling implement that uses in the said step 2 is formed with in the instrument wheel one and is fixed wheel with wheel two; Wheel three be a regulating wheel, takes turns two and takes turns three and be formed with, and sword is justified in reconditioning; < 0.5mm saidly takes turns three can to do quantitative feeding through release handle outstanding until the arch that the spool contact surface produces after being squeezed said round-bladed knife mouth r.
Detection and method for repairing and mending according to the spool gap wear extent of hydraulic efficiency slide valve of the present invention; Can the discarded guiding valve under changing be utilized with the form of reusing again; Effectively improve the service life of guiding valve; And guarantee that the spool after the reparation has high-strength wearability and excellent sealing performance, avoids impact failure.
Description of drawings
Fig. 1 is the sliding valve structure sketch map.
Fig. 2 is the view to be detected of spool.
Fig. 3 calculates principle schematic for gap width.
Fig. 4 is the use core sketch map of dimpling tool.
Fig. 5 is spool face impression and the outstanding structural representation of arch.
Wherein 1 is spool, and 2 is valve body, and 3 for wheel one, 4 is spool face for wheel two, 5 for wheel three, 6, and 7 is impression, and 8 is the arch projection.
The specific embodiment
A kind of repair method of spool gap wear extent of hydraulic efficiency slide valve comprises the detection method and subsequent the method for repairing and mending of said spool gap wear extent, and the detection method step of said spool gap wear extent is following:
Detect step 1: with spool most of extract out valve body and with spool afterbody final section flange place the valve body openings place first with valve opening in, have relative wear because of two parts this moment, axiality changes, so spool is sagging;
Detect step 2: detect the FROM of spool flange, income value is 2A'B', and B' is the central point of tested flange, and A' is a simulation points, and simulation line segment A'B' is drawn the length of A'B' perpendicular to the center line of spool by the FROM of certain flange; Detect the spool external diameter after wearing and tearing;
Detect step 3: calculate wearing and tearing back valve core and wearing and tearing back valve opening gap width AB,
Wherein, CB is the width of spool flange, and C'B' is the distance at center to the spool tail flange center of the tested flange of spool;
Detect step 4: confirm attrition value, promptly the spool wear extent be standard spool external diameter to deduct by decreasing the spool external diameter be the spool wear extent, the valve opening wear extent is decreased the spool wear extent of spool external diameter for gap width AB deducts.
The method for repairing and mending step of spool gap wear extent is following:
Repair step 1: reduce spool hardness, the heating spool between 4000-5000 ℃, the spool contact surface bluster after the The pre-heat treatment is heated to 700-750 ℃ after cooling, hardness drops to about HRC20;
Repair step 2: the spool working surface after hardness is weakened carries out impression to be handled, and uses the impression handling implement that has two fixed wheels and a regulating wheel, and above-mentioned operation is carried out repeatedly;
Repair step 3: use the arch of lathe correct grinding spool outstanding encircle to projecting height less than AB/2, precision is 0.3 μ-0.6 μ;
Repair step 4: recover spool hardness, bluster heating spool to 800 ℃-850 ℃, oil cooling; 500 ℃-520 ℃ of tempering, water-cooled or oil cooling.Make surface hardening hardness reach HRC48-55.
Repair method according to the spool gap wear extent of a kind of hydraulic efficiency slide valve of the present invention; It is characterized in that: the impression handling implement that uses in the said step 2 is formed with in the instrument wheel one and is fixed wheel with wheel two; Wheel three be a regulating wheel, takes turns two and takes turns three and be formed with, and sword is justified in reconditioning; < 0.5mm saidly takes turns three can to do quantitative feeding through release handle outstanding until the arch that the spool contact surface produces after being squeezed said round-bladed knife mouth r.
Detection and method for repairing and mending according to the spool gap wear extent of hydraulic efficiency slide valve of the present invention; Can the discarded guiding valve under changing be utilized with the form of reusing again; Effectively improve the service life of guiding valve; And guarantee that the spool after the reparation has high-strength wearability and excellent sealing performance, avoids impact failure.
Claims (3)
1. the repair method of the spool gap wear extent of a hydraulic efficiency slide valve comprises the detection method and subsequent the method for repairing and mending of said spool gap wear extent it is characterized in that the detection method step of said spool gap wear extent is following:
Detect step 1: with spool most of extract out valve body and with spool afterbody final section flange place the valve body openings place first with valve opening in, have relative wear because of two parts this moment, axiality changes, so spool is sagging;
Detect step 2: detect the FROM of spool flange, income value is 2A'B', and B' is the central point of tested flange; A' is a simulation points; Simulation line segment A'B' is perpendicular to the center line of spool, draws the length of A'B' by the FROM of certain flange, detects the spool external diameter after the wearing and tearing;
Detect step 3: calculate wearing and tearing back valve core and wearing and tearing back valve opening gap width AB,
Wherein, CB is the width of spool flange, and C'B' is the distance at center to the spool tail flange center of the tested flange of spool;
Detect step 4: confirm attrition value, promptly the spool wear extent be standard spool external diameter to deduct by decreasing the spool external diameter be the spool wear extent, the valve opening wear extent is decreased the spool wear extent of spool external diameter for gap width AB deducts.
2. the repair method of the spool gap wear extent of a kind of hydraulic efficiency slide valve as claimed in claim 1 is characterized in that, the method for repairing and mending step of said spool gap wear extent is following:
Repair step 1: reduce spool hardness, the heating spool between 4000-5000 ℃, the spool contact surface bluster after the The pre-heat treatment is heated to 700-750 ℃ after cooling, hardness drops to about HRC20;
Repair step 2: the spool working surface after hardness is weakened carries out impression to be handled, and uses the impression handling implement that has two fixed wheels and a regulating wheel, and above-mentioned operation is carried out repeatedly;
Repair step 3: use the arch of lathe correct grinding spool outstanding encircle to projecting height less than AB/2, precision is 0.3 μ-0.6 μ;
Repair step 4: recover spool hardness, bluster heating spool to 800 ℃-850 ℃, oil cooling; 500 ℃-520 ℃ of tempering, water-cooled or oil cooling.Make surface hardening hardness reach HRC48-55.
3. the repair method of the spool gap wear extent of a kind of hydraulic efficiency slide valve according to claim 2; It is characterized in that: the impression handling implement that uses in the said step 2 is formed with in the instrument wheel one and is fixed wheel with wheel two; Wheel three be a regulating wheel, takes turns two and takes turns three and be formed with, and sword is justified in reconditioning; < 0.5mm saidly takes turns three can to do quantitative feeding through release handle outstanding until the arch that the spool contact surface produces after being squeezed said round-bladed knife mouth r.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102197354A CN102794598A (en) | 2012-06-28 | 2012-06-28 | Maintenance method of valve core gap attrition quantity of hydraulic slide valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102197354A CN102794598A (en) | 2012-06-28 | 2012-06-28 | Maintenance method of valve core gap attrition quantity of hydraulic slide valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102794598A true CN102794598A (en) | 2012-11-28 |
Family
ID=47194034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102197354A Pending CN102794598A (en) | 2012-06-28 | 2012-06-28 | Maintenance method of valve core gap attrition quantity of hydraulic slide valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102794598A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113798846A (en) * | 2021-09-14 | 2021-12-17 | 开平市亿展阀芯有限公司 | Automatic valve machining and assembling equipment |
| CN115386872A (en) * | 2022-09-05 | 2022-11-25 | 兰州理工大学 | Method for repairing erosion abrasion of working edge of hydraulic servo slide valve core |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5511299A (en) * | 1994-10-19 | 1996-04-30 | Unc Artex, Inc. | Gear box valve housing repair |
| RU2155658C1 (en) * | 1998-12-16 | 2000-09-10 | Костромская государственная сельскохозяйственная академия | Method for restoring worn surfaces of parts by shifting local volumes of metal |
| CN101187554A (en) * | 2007-12-19 | 2008-05-28 | 河南中光学集团有限公司 | Partition clearance quantitative measuring and calibration method and its auxiliary tool |
| CN102297171A (en) * | 2010-07-30 | 2011-12-28 | 三一重工股份有限公司 | Hydraulic valve, hydraulic valve group and hydraulic valve control method |
| CN102335805A (en) * | 2010-07-26 | 2012-02-01 | 宝山钢铁股份有限公司 | Method for repairing flat-head cap without liner plate |
-
2012
- 2012-06-28 CN CN2012102197354A patent/CN102794598A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5511299A (en) * | 1994-10-19 | 1996-04-30 | Unc Artex, Inc. | Gear box valve housing repair |
| RU2155658C1 (en) * | 1998-12-16 | 2000-09-10 | Костромская государственная сельскохозяйственная академия | Method for restoring worn surfaces of parts by shifting local volumes of metal |
| CN101187554A (en) * | 2007-12-19 | 2008-05-28 | 河南中光学集团有限公司 | Partition clearance quantitative measuring and calibration method and its auxiliary tool |
| CN102335805A (en) * | 2010-07-26 | 2012-02-01 | 宝山钢铁股份有限公司 | Method for repairing flat-head cap without liner plate |
| CN102297171A (en) * | 2010-07-30 | 2011-12-28 | 三一重工股份有限公司 | Hydraulic valve, hydraulic valve group and hydraulic valve control method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113798846A (en) * | 2021-09-14 | 2021-12-17 | 开平市亿展阀芯有限公司 | Automatic valve machining and assembling equipment |
| CN115386872A (en) * | 2022-09-05 | 2022-11-25 | 兰州理工大学 | Method for repairing erosion abrasion of working edge of hydraulic servo slide valve core |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107436263B (en) | Spring steel wire torsion fatigue test method and device thereof | |
| RU2696116C2 (en) | Radial press | |
| CN102305755A (en) | Radial magnetic field-based online abrasive grain monitoring sensor and monitoring method | |
| CN201110801Y (en) | Toggle switch testing machine | |
| CN102519869A (en) | Method for testing cutting and bonding friction characteristics with point-contact opened-closed type pin-disc friction system | |
| CN103115758B (en) | Round spring test device | |
| CN102794598A (en) | Maintenance method of valve core gap attrition quantity of hydraulic slide valve | |
| CN107764673B (en) | A kind of biaxial stress fatigue experimental device and test method | |
| CN106078510A (en) | A kind of grinding machine with on-line measurement function | |
| CN107208823A (en) | For the method and apparatus for carrying out the method for the wear intensity for determining valve | |
| CN103383295B (en) | The comprehensive second pressure supervising device of hydrostatic support system and method | |
| CN101750245A (en) | Test method for contact stress of cam driving mechanism of diesel fuel system | |
| JP2015057293A (en) | Device and method for preventing breaking of tool during fine blanking and/or deforming of workpiece | |
| CN204944857U (en) | A kind of wheel track fault detect testing table | |
| CN104148874B (en) | Manual arc welding restorative procedure after the wearing and tearing of universal rolling mill vertical roll axle box bearing seat | |
| CN203203495U (en) | Welded calliper panel for measuring cylinder sleeve water seal tank | |
| CN104179101A (en) | Method for accurately repairing metro curve rail corrugation | |
| CN104537241A (en) | Wheel rim fatigue analysis method | |
| CN104089840A (en) | Testing device for friction wear property of automobile stamping die material | |
| CN103743511A (en) | Device for testing torque of dry friction clutch | |
| Sankhala et al. | Study of microstructure degradation of boiler tubes due to creep for remaining life analysis | |
| CN204008355U (en) | A kind of Press Tools for Automobiles material friction wear properties proving installation | |
| JP2008232823A (en) | Expanded pipe crack evaluation device of welded steel pipe, and expanded pipe crack evaluation method | |
| CN202207804U (en) | Clamping device for hydraulic instrument lathe spindle | |
| KR20160029898A (en) | Grip for Fatigue Testing Machine including Cooling Unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20180105 |
|
| AD01 | Patent right deemed abandoned |